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The bicarbonate ion has              valence electrons.

What is the mass in grams of Al that was reacted with excess HCl if [x].20 L of hydrogen gas were collected at STP in the following reaction? 2 Al (s) + 6 HCl (aq) → 2 AlCl₃ (aq) + 3 H₂ (g)

The carbonate ion has              valence electrons.

The Lewis structure of N₂O is shown on the left below with numbers on the corresponding atoms. Choose the correct set of formal charges of the atoms in ascending order of atom number.  

Draw the Lewis structure of CS₂ and then determine its electronic and molecular geometries. Electronic geometry: [x] Molecular geometry: [y]

Which atom in the O-P bond has a partial negative charge (δ⁻)?

Normal saline solution is 0.90 % NaCl (g/mL).  How many grams of sodium chloride are needed to prepare 5.80 L of a normal saline solution?

A chemist prepares an aqueous solution of sodium hydroxide.  The solution contains [x]0.0 g of NaOH and has a volume of [y]00 mL.  What is the molarity of this solution?

Draw the Lewis structure of BF₃ and then determine its electronic and molecular geometries. Electronic geometry: [x] Molecular geometry: [y]

The three major approaches for selecting employees for a foreign assignment are: clinical risk assessment, psychometric, and _______.